There are 19 US Post Offices in Fulton County serving a total of 35,917 residents equating to 1,890 residents per post office. It's estimated that approximately 57,328 packages are handled across the 19 county post offices annually. Fulton County is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 37,069. Its county seat is Lewistown, and the largest city is Canton. Fulton County comprises the Canton, IL Micropolitan Statistical Area, which is included in the Peoria-Canton, IL Combined Statistical Area. Fulton County is part of Forgottonia. Bob Bucher is the Chairman of the Fulton County Board. Mike Hays was the County Administrator until the position was eliminated."